title: Analysis of patient dose in full field digital mammography.
abstract: Now, full field digital mammography (FFDM) is widely used in diagnosis of breast cancer. With the development of FFDM, the radiation dose delivered to the patients involved in an imaging protocol is of utmost concern. Here, we analyzed the average glandular dose (AGD) and entrance surface exposure (ESE) of 1397 patients (6008 images) who underwent mammographic examinations by FFDM in three modes with automatic optimization of parameters (AOP), namely STD for standard mode, CNT for contrast mode and DOSE for dose mode. In addition, exposure factors including kVp, tube loading (mAs), and target/filter combination were evaluated. As a result, the patient dose was sorted as CNT>STD>DOSE. The dose difference among the three AOP modes was mainly attributed to the selection of mAs. The AGD and breast compressed thickness were well correlated in STD and DOSE modes. However, the correlation between CNT-delivered AGD and breast compressed thickness was dependent on the range of the breast thickness and patient age. The findings on dose and exposure characteristics of the three AOP modes get useful message of patient dose in the acquisition of FFDM.
authors.affiliation: Department of Radiology, Tangdu Hospital, Fourth Military Medical University, Xinsi Road 1, 710038 Xi'an, Shaanxi, China.
authors.forename: Baoying
authors.initials: B
authors.lastname: Chen
authors.forename: Yingmei
authors.initials: Y
authors.lastname: Wang
authors.forename: Xin
authors.initials: X
authors.lastname: Sun
authors.forename: Wei
authors.initials: W
authors.lastname: Guo
authors.forename: Ming
authors.initials: M
authors.lastname: Zhao
authors.forename: Guangbin
authors.initials: G
authors.lastname: Cui
authors.forename: Lina
authors.initials: L
authors.lastname: Hu
authors.forename: Pei
authors.initials: P
authors.lastname: Li
authors.forename: Yan
authors.initials: Y
authors.lastname: Ren
authors.forename: Jun
authors.initials: J
authors.lastname: Feng
authors.forename: Jun
authors.initials: J
authors.lastname: Yu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001822:Body Burden; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008327:Mammography / Q000706:statistics & numerical data*; D008875:Middle Aged; D009928:Organ Specificity; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement; D055815:Young Adult